Bump requirements versions

Each package version is updated to use the last one if it doesn't
require code changes. Only Django REST Framework is currently stuck on
release 3.7 since breaking changes and deprecations come with newer
releases.

mysql-requirements.txt

@@ -1 +1 @@
-mysqlclient<=1.3.99
+mysqlclient<=1.4.99

requirements.txt

@@ -1,24 +1,23 @@
 django>=1.11.8,<=1.11.99
-django-braces==1.11.0
-django-ckeditor==5.2.2
-django-reversion==2.0.12
+django-braces==1.14.0
+django-ckeditor==5.8.0
+django-reversion==3.0.5
 django-subcommand2==0.1.1
 django-xforwardedfor-middleware==2.0
 
 dj-database-url
 
 coreapi==2.3.3
-coreapi-cli==1.0.6
-djangorestframework==3.7.3
+coreapi-cli==1.0.9
+djangorestframework==3.7.7
 
-# bcrypt requires libffi-dev
-bcrypt==3.1.4
-dnspython==1.15.0
+passlib==1.7.2
+bcrypt  # Requires libffi-dev and python-dev
+
+dnspython==1.16.0
 feedparser==5.2.1
 gevent==1.4.0
-ipaddress; python_version < '3.3'
 jsonfield==2.0.2
-passlib==1.7.1
 Pillow  # Optional dependency for django-ckeditor
 progressbar33==2.4
 py-dateutil==2.2
@@ -27,5 +26,4 @@ pytz
 requests
 rfc6266
 lxml
-backports.csv; python_version < '3'
 chardet

test-requirements.txt

@@ -1,6 +1,5 @@
 argon2-cffi>=16.1.0
 factory-boy>=2.4
-mock==2.0.0; python_version < '3.3'
-httmock==1.2.5
-testfixtures==4.7.0
+httmock==1.3.0
+testfixtures==6.10.3
 tox